You’ll want to find a manufacture date. This is usually found on a label on the exterior of your system.
If your unit is less than five years old, it might still be warrantied. At the same time, warranty terms and conditions vary between manufacturer and installing company.
At Rob's Albertan Service Experts, we can confirm your warranty state via a system inspection. We also provide HVAC service memberships in Edmonton for residential heating and cooling equipment, regardless of unit age or manufacturer warranty standing.